Electric mattress

ABSTRACT

A heating cover such as a blanket for therapy having a pair of heating wires woven directly onto the cover and insulated by the fill of the cover material.

[4 1 Sept. 11, 1973 2,385,577 9/1945 Jacobs......................r..... 2,938,992 5/1960 m C r 0 R M R Th Ar m C I Rn mm E6 LV Em MM U Delivery, Le Roy, Kans. 66857 Oct. 19, 1970 Primary ExaminerC. L. Albritton 22 Filed:

Appl. No.: 81,909

T C A R T S B A 1 7 5 80 00w 2/ I14 8 b7 M 2 ,m u .2 5 .ll 2 W l l 2 1 2 n W 2 m w m 1 "U 2 u mflum c u r u a u e H S l. m l d S UhF 1]] 2 8 555 [[r\ 219 549 545; 33 30 410; 12 379; 39 425 A heating cover such as a blanket for therapy having a pair of heating wires woven directly onto the cover and insulated by the fill of the cover material.

[56] References Cited UNITED STATES PATENTS 2,381,218 8/1945 Jacobs............................ 219/545 X 1 Claim, 1 Drawing Figure WARP PATENIEDSEPI 1 an WARP WEFT

ELECTRIC MATTRESS BACKGROUND OF THE INVENTION In ordinary electric blankets the heavy wool adds weight and delays the transfer of heat from the hot wires to the patient who is usually covered with a rubber sheet. In addition, insulated wire within an insulating wall will further decrease the efficiency of the heat transfer from the hot wires to the person on the bed.

SUMMARY OF THE INVENTION DESCRIPTION OF THE DRAWINGS A better understanding of the invention may be obtained from the drawings and description forming a part of this disclosure and in which:

The FIGURE is a top view of the thermal cover showing the weaving pattern.

DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in the figure, a plurality of warp threads of suitable material such as cotton are placed in a normal pattern for weaving. r I

A weft thread 11 of suitable material such as cotton similar to the warp threads 10 is woven full width through the warp threads in a conventional manner for and thrown to the left to emerge at point 23 which is approximately 1% inches inside the left hand edge 16 of the cover 13.

The weaving pattern continues as follows:

a. Weave one half inch of thread 11 full width of the cover 13.

b. Move the resistance wire which is 1% inches inside the edge of the cover 13 up one half inch, outside the weft, and parallel to the weft. Enter the wire into the weave pattern and throw it through the warp to emerge one inch inside the edge of the cover 13.

c. Weave one half inch of weft fill full width of the cover 13.

d. Move the resistance wire which is one inch in from the edge of the cover and closest to the bottom of the cover up parallel to the warp for a distance of 1% inches. Enter the wire into the weave pattern and throw it through the warp to emerge at a point one and one half inches from the edge of the cover 13.

Keep repeating steps a, b, c and d until the dimensional length is only short 1 inch. Bring the two resistance wires 14 and 19 out of the weave at a point one inch from the edge of the cover. Weave a final'inch of full width fill 11 to make the=top border.

The finished thermal cover will have these characteristics:

a. A 1 inch border around'its periphery.

b. Two continuous resistance wires woven through the warp, parallel to the bottom and the sides, and separated by weft fill so that they remain approximately one half inch apart. This will preclude any short circuiting of the wires.

a distance of approximately one inch to form the bot-,

tom border 12 of the thermal cover. 13.

When this predetermined amount of weaving has been reached, a flexible resistance wire 14 is entered into theweft pattern at point 15 which is approximately 1 inch inside the left hand edge 16 of the cover 13. The wire 14 is woven through the warp 10 to emerge at point 17 which is approximately 1 inch inside the right hand edge 18 of the cover 13.

The weft pattern is again picked up by the thread 11 and approximately one half inch of full width of the cover 13 is woven.

A second flexible resistance wire 19 similar to wire 14 is then introduced into the weft pattern at point 20 which is approximately one inch inside the left hand border 16, and woven into the warp 10 to emerge at point 21 which is approximately 1 a inches inside the I right hand edge 18.

The weft pattern is again picked up by thread 11 and approximately one half inch of full width of the cover 13 is woven.

At this point wire 19 is moved up over the weft 11, parallel to the warp l0, and entered into the weave where it is thrown to the left to emerge at point 22 which is approximately one inch inside the left hand edge 16.

The weft pattern is again picked up by thread 11 and approximately one half inch of the full width of the cover 13 is woven.

Wire 14 at point 17 is then moved up over the weft and parallel to the warp 10 for a distance of approximately 1% inches where it is entered into the weave The remote ends of the two wires 14 and 19 are joined. At one end by suitable means 24 such as soldering. At the other end by suitable means 25 such as soldering and the .use of connecting thimbles to a length of insulated electric conducting wire 26 which terminates in an electrical connector plug 27.

The weaving of the resistance wires 14 and 19 into thecover 13 will provide insulation and the amount of unprotected wire where the wires move up at the edges is minimal. However, it is a matter of prime concern that this blanket only be used in conjunction with another item which will insulate the user fully from the blanket.

As an example, for heat therapy, the blanket would be spread on a support item such as a mattress, a rubber hospital sheet would be spread over the entire blanket. The user would lie on one half the rubber sheet and blanket, the other half would be folded over him and the blanket plugged into the current supply.

When the user is finished, the blanket should be dis connected from the current before moving the top covering.

Use of this type of an electric blanket provides a light weight item with a minimum of thermal insulation.

Use of 'the blanket in a hospital will provide a theraputic blanket which by its simplicity will result in a substantial savings.

I claim: I

1. A woven thermal cove including warp strands of insulation material interwoven with continuous weft strands of insulation material having two continuous flexible resistance wires woven into said warp in a spaced parallel pattern, said wires being soldered together at their remote end; the other ends of said resistance wires being connected to one end of an insulated 3 ,7 5 8 ,747 3 4 electrical cable exterior of said thermal cover and said wire being at one corner of said cover, while the which at its other end is attached to an electric connector plug, said spaced, parallel wires being separated about one-half inch from each other, and 1 inch from bemg located an opposne comer of sad cover the peripheral edge of said cover, said soldered ends of 5 opposite ends of said wires connected to said cable 

1. A woven thermal cove including warp strands of insulation material interwoven with continuous weft strands of insulation material having two continuous flexible resistance wires woven into said warp in a spaced parallel pattern, said wires being soldered together at their remote end; the other ends of said resistance wires being connected to one end of an insulated electrical cable exterior of said thermal cover and which at its other end is attached to an electric connector plug, said spaced, parallel wires being separated about one-half inch from each other, and 1 inch from the peripheral edge of said cover, said soldered ends of said wire being at one corner of said cover, while the opposite ends of said wires connected to said cable being located at an opposite corner of said cover. 